Promonitor NRF 560
Hauser
5
1.4
Notes on safety conventions and symbols
In order to highlight safety-relevant or alternative operating procedures in the manual, the following
conventions have been used, each indicated by a corresponding symbol in the margin.
Safety conventions
Warning!
A warning highlights actions or procedures which, if not performed correctly, will lead to
personal injury, a safety hazard or destruction of the instrument
Caution!
Caution highlights actions or procedures which, if not performed correctly, may lead to
personal injury or incorrect functioning of the instrument
Note!
A note highlights actions or procedures which, if not performed correctly, may indirectly
affect operation or may lead to an instrument response which is not planned
Explosion protection
Device certified for use in explosion hazardous area
If the device has this symbol embossed on its name plate it can be installed in an explosion
hazardousarea
Explosion hazardous areas
Symbol used in drawings to indicate explosion hazardous areas. Devices located in and
wiringentering areas with the designation “explosion hazardous areas” must conform
with the stated type of protection.
Safe area (non-explosion hazardous area)
Symbol used in drawings to indicate, if necessary, non-explosion hazardous areas. Devices
located in safe areas still require a certificate if their outputs run into explosion hazardous
areas
Electrical symbols
Direct voltage
A terminal to which or from which a direct current or voltage may be applied or supplied
Alternating voltage
A terminal to which or from which an alternating (sine-wave) current or voltage may be
applied or supplied
Grounded terminal
A grounded terminal, which as far as the operator is concerned, is already grounded by
means of an earth grounding system
Protective grounding (earth) terminal
A terminal which must be connected to earth ground prior to making any other
connection to the equipment
Equipotential connection (earth bonding)
A connection made to the plant grounding system which may be of type e.g. neutral star
or equipotential line according to national or company practice
Temperature resistance of the connection cables
States, that the connection cables must be resistant to a temperature of at least 65 °C.
EX
EX
t > 65°C
1 Safety instructions
